The Ohakunea group in Tasmania, with description of Colonomyia tasmanica sp. n. (Diptera: Sciaroidea) Author Jaschhof, Mathias Author Jaschhof, Catrin text Beiträge Zur Entomologie = Contributions to Entomology 2008 2008-11-15 58 2 441 453 https://www.contributions-to-entomology.org/article/view/1734 journal article 6465 10.21248/contrib.entomol.58.2.441-453 8e613818-120e-411b-8dfb-f18be609622d 0005-805X 4752097 Colonomyia albicaulis COLLESS , 1963 ( Figs 4B , 5B ) COLLESS 1963: 305 , HIPPA &ZASCHHOF 2004: 345, figs 1-8. Supplement to the redescription by HIPPA & JASCHHOF (2004) : Male. Head: Maxillary palpus at least in some specimens 5-segmented, with first segment weak and non-setose, and third segment bearing translucent setiform sensilla. Legs: Fore basitarsus proximally with 2-3 pale setiform sensilla, mid basitarsus with 4-5, and hind basitarsus with 3-5. Fig. 4: Anterior portion of female terminalia, dorsal view. - A: Colonomyia tasmanica sp. n. (paratype); - B: Colonomyia albicaulis COLLESS (specimen from Warra). 1 = eighth tergum, 2 = pubescent lobe(s) on posterior margin of eighth tergum, 3 = ninth tergite, 4 = tenth tergite, 5 = proximal cercus segment. Length of scale bar = 0.05 mm. Terminalia: Head-like extension of ejaculatory apodeme with 1 mesal pair of straight, retractable processes ventrally, 1 lateral pair of widely spread, curved processes dorsally and stiff, subrectangular plate between the process pairs. Sperm sac similar to that of tasmanica but smaller. Female. Terminalia: With modification of segments 8 and 9 as follows. Tergite 8 with 2 wide pubescent lobes on posterior margin ( Fig. 4B ). Sternum 8 with large unsclerotized portion anterior of gonocoxal emargination, and interior sclerotized brace laterally. Surface of tergum 9 bare. Tergite 9 internalized, forming together with gonapophyses strongly sclerotized, complex interior apparatus ( Figs 4B , 5B ). Gonapophyses merged anteriorly; notum moderately sclerotized, with short coneshaped appendage ( Fig. 5B ). Gonocoxites not traceable. Fig. 5: Dorsal wall of female genital chamber, ventral view. - A: Colonomyia tasmanica sp. n. (paratype); - B: Colonomyia albicaulis COLLESS (specimen from Warra). 1 = gonapophysis of ninth segment, 2 = notum, 3 = gonocoxite of ninth segment, 4 = tergite of ninth segment, 5 = spermathecal eminence. Length of scale bar = 0.05 mm. Distribution and phenology: The distribution of albicaulis in the Australian mainland is southeastern, encompassing the southeasternmost Queensland (unpublished data), New South Wales , Victoria , and Australian Capital Territory . In Tasmania , albicaulis has been found hitherto at five sites distant to one other (including Mt Wellington , cf. HIPPA & JASCHHOF 2004 ). At Warra findings are from all months but June, September and November, and altitudes ranging from 100 to 1100 m a.s.l. Maximum number is 13 individuals found in a single Malaise sample. Adults were trapped in both unmanaged and treated forest areas. At Mt Weld one male and one female of albicaulis were found at 1100 m a.s.l. in the same pitfall trap that caught also tasmanica . Material studied (on slide): Tasmania : 8 males , 1 female , Warra LTER Site, Manuka Road, 14 April 2000 , R . BASHFORD; 1 female , same site but 2 May 2003 ; 1 male , 1 female , same site but 1 July 2005 , 1 male , same site but 1 Aug. 2005 ; 1 male , same site but 2 April 2007 . Further material (in ethanol): Tasmania : 47 males , 37 females , Warra LTER Site , Manuka Road and Mt Weld , 24 March 2000 - 7 Jan. 2008 (35 Malaise , 1 pitfall and 1 aspirator samples), R . BASHFORD, N. DORAN , M. & C. JASCHHOF ; 4 males , 2 females , Mersey River 4 km S Liena , 30 Dec. 2007 , M. JASCHHOF ; 1 female , Lake St. Clair SW shore, 31 Dec. 2007 , M. JASCHHOF ; 1 male , Mt Field National Park , near Lake Dobson Road ( 750 m a.s.l. , 42.40.857S, 146.39.367E), 20 Feb.-2 March 2006 , N. JÖNSSON, T . MALM & D. WILLIAMS .